CN113208143A - Hot air two-stage axial heating sheet cut tobacco dryer and operation method thereof - Google Patents
Hot air two-stage axial heating sheet cut tobacco dryer and operation method thereof Download PDFInfo
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- CN113208143A CN113208143A CN202110599969.5A CN202110599969A CN113208143A CN 113208143 A CN113208143 A CN 113208143A CN 202110599969 A CN202110599969 A CN 202110599969A CN 113208143 A CN113208143 A CN 113208143A
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 119
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 119
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 34
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 239000012071 phase Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000007790 solid phase Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 39
- 230000000694 effects Effects 0.000 abstract description 13
- 235000019504 cigarettes Nutrition 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 238000007791 dehumidification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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- Drying Of Solid Materials (AREA)
Abstract
The invention provides a hot air two-section type axial heating sheet cut-tobacco drier and an operation method thereof, wherein the hot air two-section type axial heating sheet cut-tobacco drier comprises a first axial hot air pipe (1), a second axial hot air pipe (2), a feeding assembly (3), a discharging assembly (4), a roller (5) and a gas phase output pipe (6); the first axial hot air pipe (1) and the second axial hot air pipe (2) are arranged along the axis of the roller (5), and the first axial hot air pipe (1) and the second axial hot air pipe (2) convey hot air into the roller (5); the feeding component (3) is positioned at the upstream end of the roller (5), and the discharging component (4) and the gas phase output pipe (6) are positioned at the downstream end of the roller (5). The hot air two-section type axial heating sheet cut-tobacco dryer realizes the inlet and outlet of hot air from the axial center of the roller and two-section heating mode, improves the uniformity and accuracy of tobacco drying, and further effectively improves the tobacco drying effect.
Description
Technical Field
The invention belongs to the technical field of tobacco processing, and particularly relates to a hot air two-section type axial heating sheet cut tobacco dryer and an operation method thereof.
Background
In the production process of the tobacco shred manufacturing line, the tobacco dryer is one of important devices and is a key device for ensuring the internal quality of cigarettes. The sheet cut tobacco dryer is also called a roller cut tobacco dryer, is a core link of a cigarette cut tobacco production process, and is mainly used for drying tobacco by combining two modes of sheet (cylinder wall temperature) heat conduction and hot air convection to remove partial moisture of the tobacco, and is used for quickly drying cut tobacco leaves, cut stems and the like at high temperature on a tobacco cut tobacco production line so as to meet the processing requirements of subsequent processes. At present, a domestic thin-plate cut-tobacco drier generally adopts one-section heating, tobacco is dried mainly by combining two modes of thin-plate (cylinder wall temperature) heat conduction and hot air convection, partial moisture of the tobacco is removed, and the cylinder wall temperature and the hot air temperature are key indexes influencing the sensory quality of cigarette products and are also important factors influencing the moisture of the tobacco at a thin-plate cut-tobacco drying outlet. For stabilizing the tobacco moisture at the tobacco shred drying outlet of the thin plate, the traditional one-section type thin plate tobacco shred drying control mode mainly has three forms of fixing material flow and adjusting the wall temperature of a cylinder by hot air, fixing material flow and adjusting the wall temperature of the cylinder by hot air or adjusting the hot air speed by hot air, and adjusting the material flow by the fixed wall temperature and the hot air temperature, and the result is that the tobacco moisture at the tobacco shred drying outlet of the thin plate is stabilized by adjusting the processing strength of the thin plate tobacco shred drying. Meanwhile, the sheet cut-tobacco drier with one-stage heating lacks flexibility in regulation and control of tobacco drying effect, has large regulation range, and is difficult to ensure the accuracy required by standards.
In addition, hot air in the sheet cut-tobacco drier has two main modes of concurrent type and countercurrent type, namely, hot air enters (concurrent type) or flows out (countercurrent type) from one side or the upper end of the roller inlet, and flows out (concurrent type) or enters (countercurrent type) from the top end of a discharging cover arranged at the roller outlet. However, the positions of hot air entering or flowing out of the roller are not at the axial center of the roller, so that the temperature distribution of the cross section in the roller is uneven, the temperature near the hot air is high, the temperature far away from the hot air is low, the tobacco is dried unevenly, and the drying quality of the tobacco and the uniformity of the moisture of the tobacco at a cut tobacco drying outlet are influenced.
The present invention is proposed to solve the above two problems.
Disclosure of Invention
The hot air convection drying of tobacco materials is one of important modes of tobacco drying, a hot air two-section type axial heating sheet cut tobacco dryer is developed, hot air enters and flows out from the axial center of a roller and two-section type heating modes are realized, the uniformity and accuracy of tobacco drying are improved, the tobacco drying effect is effectively improved, and the hot air convection drying machine has remarkable practical significance for improving the tobacco sheet drying processing quality and promoting the technical development of cigarette processing technology.
The invention aims to provide a hot air two-section type axial heating sheet cut-tobacco dryer aiming at the defects of the prior art, which realizes the uniform distribution of hot air in the radial direction of a roller and effectively improves the stability of a hot air convection mode on the tobacco drying effect; meanwhile, a hot air two-section type heating mode is adopted, two sections of areas of the hot air convection heating roller and the temperature of hot air can be adjusted, and the drying effect and the control precision of the sheet cut-tobacco drier can be effectively improved.
More simply, the invention provides a hot air two-stage axial heating sheet cut-tobacco dryer, which realizes the inlet and outlet of hot air from the axial center of a roller and a two-stage heating mode, improves the uniformity and accuracy of tobacco drying, and further effectively improves the tobacco drying effect.
In order to achieve the above object, the first aspect of the present invention provides a hot air two-stage axial heating thin-plate cut-tobacco drier, comprising a first axial hot air pipe 1, a second axial hot air pipe 2, a feeding assembly 3, a discharging assembly 4, a roller 5 and a gas phase output pipe 6;
the first axial hot air pipe 1 and the second axial hot air pipe 2 are arranged along the axis of the drum 5, and the first axial hot air pipe 1 and the second axial hot air pipe 2 convey hot air into the drum 5;
the second axial hot air pipe 2 is connected with the upstream end of the roller 5 through a first diffusion section 7; the first axial hot air pipe 1 is positioned inside the second axial hot air pipe 2 and extends to the inside of the drum 5 along the central axis direction of the drum 5;
the feeding assembly 3 is positioned at the upstream end of the roller 5, and the discharging assembly 4 and the gas phase output pipe 6 are positioned at the downstream end of the roller 5.
Further, the feeding assembly 3 comprises a tobacco feeding part 31, a feeding air lock 32 and a feeding inclined pipe 33, wherein the bottom of the tobacco feeding part 31 is connected with the feeding air lock 32, the bottom of the feeding air lock 32 is connected with the feeding inclined pipe 33, and the feeding inclined pipe 5 passes through the first diffusion section 7 and extends to the bottom of the upstream end of the roller 5; the material in the tobacco feeding part 31 falls into the roller 5 through the tobacco feeding part 31, and the inclined tube is adopted to enter the front end bottom of the roller, so that the tobacco breakage caused by the height difference when the tobacco enters the roller is effectively reduced, and the consumption of the tobacco raw material in the process can be effectively reduced.
Further, the discharging assembly 4 comprises a discharging cover 41, a discharging hopper 42, a discharging airlock 43 and a discharging pipe 44;
the ejection of compact cover 41 with drum 5 downstream end links to each other, just ejection of compact cover 41 bottom is connected with ejection of compact funnel 42, ejection of compact funnel 42 passes through ejection of compact airlock 43 with the discharging pipe 44 is connected to guarantee stable ejection of compact.
Furthermore, one end of the first axial hot air pipe 1, which is positioned in the roller 5, is connected with a second diffusion section 8, so that hot air can be blown out in a uniformly dispersed manner; a drum tilt angle adjuster 51 and a support steel frame 52 are further provided below the drum 5 to support the drum 5 and adjust the angle of the drum 5.
Further, the gas phase output pipe 6 is connected with the middle part of the discharge cover 41.
Further, the downstream end of the gas phase output pipe 6 further comprises a cyclone assembly 9, the cyclone assembly 9 comprises a cyclone 91 and a gas phase outlet 92 and a solid phase outlet 93, and further separates gas and solid in the gas flow discharged from the gas phase output pipe, and preferably, a valve 61 is further arranged between the gas phase output pipe 6 and the cyclone assembly 9.
Further, the length of the first axial hot air pipe 1 is adjustable, and the part of the first axial hot air pipe extending into the roller 5 can extend to 1/3-2/3 of the length of the roller 5.
A second aspect of the present invention provides a method for operating a hot air two-stage axial heating thin-plate cut-tobacco dryer according to the first aspect of the present invention, comprising the steps of:
A. hot air axially enters the drum 5 from the upstream end through the first axial hot air pipe 1 and the second axial hot air pipe 2, and then is discharged out of the drum 5 through the gas phase output pipe 6;
B. the tobacco material enters the roller 5 through the feeding component 3, and is discharged out of the roller 5 through the discharging component 4 after being dried;
C. the length of the first axial hot air pipe 1 extending into the roller 5 can be adjusted;
the steps are not in sequence.
Furthermore, the temperature and the air speed of hot air in the first axial hot air pipe 1 are adjustable, the temperature range of the hot air is 120-180 ℃, and the air speed range of the hot air is 0-3.0 m/s; the temperature and the air speed of hot air in the second axial hot air pipe 2 are adjustable, the temperature range of the hot air is 120-180 ℃, and the air speed range of the hot air is 0-1.0 m/s; the temperature of the cylinder wall of the roller 5 and the rotating speed of the roller are adjustable, the temperature range of the cylinder wall is 100-150 ℃, and the rotating speed range of the roller is 7-13 r/min.
Further, the tobacco entering the feeding assembly 3 can be one or a mixture of several of tobacco leaves, tobacco stems, thin slices, cut tobacco, cut stems, thin slices and the like.
Compared with the prior art, the invention has the following beneficial effects:
1. the hot air pipe is axially arranged in the sheet tobacco dryer, so that hot air axially enters and flows out of the roller, the hot air is uniformly distributed in the radial direction of the roller, the uniformity of the hot air convection heating of tobacco in the roller is further improved, and the stability of tobacco moisture at a tobacco drying outlet and the tobacco drying effect can be effectively improved.
2. The sheet tobacco dryer comprises a first axial hot air pipe 1 and a second axial hot air pipe 2, hot air enters a roller in a two-stage mode, traditional hot air one-stage convection drying can be achieved by closing one section of hot air, two-stage hot air heating can be adjusted, and the dehumidification effect of the hot air on tobacco materials in the roller can be flexibly adjusted and controlled by means of adjusting the length of the first hot air pipe 1, the temperature of the hot air, the speed of the hot air, a heating area and the like, so that the accuracy of the hot air on the tobacco drying is effectively improved, the accuracy between the tobacco indexes and standards at a discharge port is guaranteed, and the tobacco drying effect is further improved.
3. The length of the first axial hot air pipe 1 in the sheet tobacco dryer is adjustable, and the part of the first axial hot air pipe extending into the roller 5 can extend to 1/3-2/3 of the length of the roller 5, so that the heating area of hot air blown out of the first axial hot air pipe 1 to tobacco materials in the roller 5 can be adjusted, the drying intensity of a certain section of tobacco materials in the roller 5 can be pertinently strengthened or weakened according to the actual drying effect, and the operation is more flexible and flexible.
4. The tobacco material feeding inclined tube of the sheet cut-tobacco drier enters the bottom of the front end of the roller, so that tobacco breakage caused by height difference when the tobacco enters the roller is effectively reduced in the process of sliding the tobacco material, and further, the consumption of tobacco raw materials in the feeding process can be effectively reduced.
5. The invention fully utilizes the axial heating energy of the hot air to uniformly heat the tobacco materials in the roller and flexibly regulates and controls the dehumidification effect of the hot air on the tobacco materials in the roller by the front-end and middle-end two-section heating, develops the sheet cut tobacco dryer with the two-section hot air axial heating, can effectively improve the tobacco drying effect, improves the quality and stability of the drying process, and has better application value and practical significance. Meanwhile, the device has the characteristics of simple structure, practical method, strong adaptability and the like, and has better application prospect and popularization and application value.
Drawings
FIG. 1 is a schematic view of the whole structure of a hot air two-stage axial heating thin-plate cut-tobacco drier of the present invention.
Description of reference numerals: 1-a first axial hot air pipe, 2-a second axial hot air pipe, 3-a feeding component, 31-a tobacco feeding component, 32-a feeding airlock, 33-a feeding inclined pipe, 4-a discharging component, 41-a discharging cover, 42-a discharging hopper, 43-a discharging airlock, 44-a discharging pipe, 5-a roller, 51-a roller inclination angle regulator, 52-a supporting steel frame, 6-a gas phase output pipe, 61-a valve, 7-a first diffusion section, 8-a second diffusion section, 9-a cyclone separator component, 91-a cyclone separator, 92-a gas phase outlet and 93-a solid phase outlet.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected.
In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "provided" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
It will be understood by those skilled in the art that, unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In order to better understand the purpose, structure and function of the present invention, the thin plate cut-tobacco drier with two-stage axial heating by hot air according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a hot air two-stage axial heating thin-plate cut tobacco dryer comprises a first axial hot air pipe 1, a second axial hot air pipe 2, a feeding assembly 3, a discharging assembly 4, a roller 5 and a gas phase output pipe 6;
the first axial hot air pipe 1 and the second axial hot air pipe 2 are arranged along the axis of the drum 5, and the first axial hot air pipe 1 and the second axial hot air pipe 2 convey hot air into the drum 5;
the second axial hot air pipe 2 is connected with the upstream end of the roller 5 through a first diffusion section 7; the first axial hot air pipe 1 is positioned inside the second axial hot air pipe 2 and extends to the inside of the drum 5 along the central axis direction of the drum 5;
the feeding assembly 3 is positioned at the upstream end of the roller 5, and the discharging assembly 4 and the gas phase output pipe 6 are positioned at the downstream end of the roller 5.
Further, the feeding assembly 3 comprises a tobacco feeding part 31, a feeding air lock 32 and a feeding inclined pipe 33, wherein the bottom of the tobacco feeding part 31 is connected with the feeding air lock 32, the bottom of the feeding air lock 32 is connected with the feeding inclined pipe 33, and the feeding inclined pipe 5 passes through the first diffusion section 7 and extends to the bottom of the upstream end of the roller 5; the material in the tobacco feeding part 31 falls into the roller 5 through the tobacco feeding part 31, and the inclined tube is adopted to enter the front end bottom of the roller, so that the tobacco breakage caused by the height difference when the tobacco enters the roller is effectively reduced, and the consumption of the tobacco raw material in the process can be effectively reduced.
The discharging assembly 4 comprises a discharging cover 41, a discharging hopper 42, a discharging air lock 43 and a discharging pipe 44;
the ejection of compact cover 41 with drum 5 downstream end links to each other, just ejection of compact cover 41 bottom is connected with ejection of compact funnel 42, ejection of compact funnel 42 passes through ejection of compact airlock 43 with the discharging pipe 44 is connected to guarantee stable ejection of compact.
One end of the first axial hot air pipe 1, which is positioned in the roller 5, is connected with a second diffusion section 8, so that hot air can be uniformly dispersed and blown out more conveniently; a drum tilt angle adjuster 51 and a support steel frame 52 are further provided below the drum 5 to support the drum 5 and adjust the angle of the drum 5.
The gas phase output pipe 6 is connected with the middle part of the discharge cover 41.
The downstream end of the gas phase outlet pipe 6 further comprises a cyclone assembly 9, the cyclone assembly 9 comprises a cyclone 91 and a gas phase outlet 92 and a solid phase outlet 93, and further separates gas and solid in the gas flow discharged from the gas phase outlet pipe, and preferably, a valve 61 is further arranged between the gas phase outlet pipe 6 and the cyclone assembly 9.
Wherein the first axially heated air duct 1 is adjustable in length and extends into the drum 5 for a portion 1/2 of the length of the drum 5.
The temperature and the wind speed of hot wind in the first axial hot wind pipe 1 are respectively 140 ℃ and 1.0m/s, and the temperature and the wind speed of hot wind in the second axial hot wind pipe 2 are respectively 150 ℃ and 1.0 m/s;
the temperature of the cylinder wall of the roller 5 and the rotating speed of the roller are respectively 120 ℃ and 9 r/min.
The experimental object is 6000kg cut tobacco shreds in a tobacco making production line of a certain cigarette factory, the moisture content of the tobacco shreds is 21.5%, the standard requirement of the moisture content of the dried tobacco shreds is 13.0 +/-1.0%, and the standard requirement of the temperature of the tobacco shreds is 53 +/-3.0 ℃. The cut tobacco shreds were divided into two equal parts, and the tobacco shreds were dried by conventional sheet tobacco drying and the present invention, respectively, and the results after treatment are shown in Table 1.
TABLE 1 comparative analysis of conventional sheet cut tobacco and cut tobacco dried according to the invention
| Drying mode | Cut tobacco moisture content at cut tobacco drying outlet | Cut tobacco temperature at cut tobacco drying outlet | Rate of filament output |
| Traditional thin plate cut tobacco dryer | 13.3±0.6％ | 53.4±1.5℃ | 73.56％ |
| The invention relates to a cut tobacco dryer | 13.1±0.2％ | 53.0±0.5℃ | 73.78％ |
As can be seen from Table 1, compared with the traditional sheet tobacco dryer, after the sheet tobacco is dried by adopting the sheet tobacco dryer, the central values of the moisture content and the temperature of the tobacco are closer to the standard requirements, and the fluctuation is obviously reduced; meanwhile, the cut tobacco output rate of the sheet cut tobacco drying machine is high, which shows that the sheet cut tobacco drying machine has obvious advantages in the aspects of improving the quality and stability of the drying process, improving the tobacco drying effect, reducing the raw material consumption of the process and the like.
Claims (10)
1. A hot air two-section type axial heating sheet cut tobacco dryer is characterized by comprising a first axial hot air pipe (1), a second axial hot air pipe (2), a feeding assembly (3), a discharging assembly (4), a roller (5) and a gas phase output pipe (6);
the first axial hot air pipe (1) and the second axial hot air pipe (2) are arranged along the axis of the drum (5), and the first axial hot air pipe (1) and the second axial hot air pipe (2) convey hot air into the drum (5);
the second axial hot air pipe (2) is connected with the upstream end of the roller (5) through a first diffusion section (7); the first axial hot air pipe (1) is positioned inside the second axial hot air pipe (2) and extends to the inside of the roller (5) along the central shaft direction of the roller (5);
the feeding assembly (3) is positioned at the upstream end of the roller (5), and the discharging assembly (4) and the gas phase output pipe (6) are positioned at the downstream end of the roller (5).
2. A hot air two-stage axial heating sheet tobacco dryer according to claim 1, characterized in that the feeding assembly (3) comprises a tobacco feeding member (31), a feeding airlock (32) and a feeding chute (33), the bottom of the tobacco feeding member (31) being connected to the feeding airlock (32), the bottom of the feeding airlock (32) being connected to the feeding chute (33), the feeding chute (5) passing through the first diffuser section (7) and extending to the bottom of the upstream end of the drum (5).
3. The hot air two-stage axial heated sheet tobacco dryer according to claim 1, characterized in that the discharge assembly (4) comprises a discharge hood (41), a discharge funnel (42), a discharge airlock (43) and a discharge pipe (44);
the discharging cover (41) is connected with the downstream end of the roller (5), a discharging funnel (42) is connected to the bottom of the discharging cover (41), and the discharging funnel (42) is connected with the discharging pipe (44) through a discharging air lock (43).
4. The hot-air two-stage axial-heating thin-sheet cut-tobacco drier according to claim 1, characterized in that the first axial hot-air pipe (1) is connected to a second diffuser (8) at one end inside the drum (5); and a roller inclination angle adjuster (51) and a supporting steel frame (52) are arranged below the roller (5).
5. Two-stage axial heated sheet tobacco dryer according to claim 3, characterized in that the gas phase outlet conduit (6) is connected to the discharge hood (41).
6. The hot-air two-stage axially heated sheet-metal tobacco dryer according to claim 1, characterized in that the downstream end of the gas-phase outlet pipe (6) further comprises a cyclone assembly (9), the cyclone assembly (9) comprising a cyclone (91) and a gas-phase outlet (92) and a solid-phase outlet (93), and preferably a valve (61) is further provided between the gas-phase outlet pipe (6) and the cyclone assembly (9).
7. The hot air two-stage axial heating sheet tobacco dryer according to claim 1, characterized in that the first axial hot air duct (1) is adjustable in length, and the part thereof extending into the drum (5) can extend to 1/3-2/3 of the length of the drum (5).
8. A method of operating a hot air two-stage axial heated sheet tobacco dryer according to any one of claims 1 to 7, comprising the steps of:
A. hot air axially enters the drum (5) from the upstream end through the first axial hot air pipe (1) and the second axial hot air pipe (2), and then is discharged out of the drum (5) through the gas phase output pipe (6);
B. the tobacco material enters the inside of the roller (5) through the feeding component (3), and is discharged out of the roller (5) through the discharging component (4) after being dried;
C. the length of the first axial hot air pipe (1) extending into the roller (5) can be adjusted;
the steps are not in sequence.
9. The operating method according to claim 8, wherein the temperature and the air speed of the hot air in the first axial hot air duct (1) are adjustable, the temperature of the hot air is in the range of 120 to 180 ℃, and the air speed of the hot air is in the range of 0 to 3.0 m/s; the temperature and the air speed of hot air in the second axial hot air pipe (2) are adjustable, the temperature range of the hot air is 120-180 ℃, and the air speed range of the hot air is 0-1.0 m/s; the temperature of the cylinder wall of the roller (5) and the rotating speed of the roller are adjustable, the temperature range of the cylinder wall is 100-150 ℃, and the rotating speed range of the roller is 7-13 r/min.
10. Operating method according to claim 8, characterized in that the tobacco entering the feeding assembly (3) can be one or a mixture of several of tobacco leaves, stems, sheets, cut tobacco, cut stems, cut sheets, etc.
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